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| 1 /*********************************************************************** | 1 /*********************************************************************** |
| 2 Copyright (c) 2006-2011, Skype Limited. All rights reserved. | 2 Copyright (c) 2006-2011, Skype Limited. All rights reserved. |
| 3 Redistribution and use in source and binary forms, with or without | 3 Redistribution and use in source and binary forms, with or without |
| 4 modification, are permitted provided that the following conditions | 4 modification, are permitted provided that the following conditions |
| 5 are met: | 5 are met: |
| 6 - Redistributions of source code must retain the above copyright notice, | 6 - Redistributions of source code must retain the above copyright notice, |
| 7 this list of conditions and the following disclaimer. | 7 this list of conditions and the following disclaimer. |
| 8 - Redistributions in binary form must reproduce the above copyright | 8 - Redistributions in binary form must reproduce the above copyright |
| 9 notice, this list of conditions and the following disclaimer in the | 9 notice, this list of conditions and the following disclaimer in the |
| 10 documentation and/or other materials provided with the distribution. | 10 documentation and/or other materials provided with the distribution. |
| 11 - Neither the name of Internet Society, IETF or IETF Trust, nor the | 11 - Neither the name of Internet Society, IETF or IETF Trust, nor the |
| 12 names of specific contributors, may be used to endorse or promote | 12 names of specific contributors, may be used to endorse or promote |
| 13 products derived from this software without specific prior written | 13 products derived from this software without specific prior written |
| 14 permission. | 14 permission. |
| 15 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS “AS IS” | 15 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| 16 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | 16 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 17 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | 17 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 18 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | 18 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
| 19 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | 19 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 20 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | 20 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 21 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | 21 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 22 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | 22 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 23 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | 23 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 24 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | 24 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 25 POSSIBILITY OF SUCH DAMAGE. | 25 POSSIBILITY OF SUCH DAMAGE. |
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| 87 const opus_int len /* I vector lengths
*/ | 87 const opus_int len /* I vector lengths
*/ |
| 88 ) | 88 ) |
| 89 { | 89 { |
| 90 opus_int i; | 90 opus_int i; |
| 91 opus_int64 sum = 0; | 91 opus_int64 sum = 0; |
| 92 for( i = 0; i < len; i++ ) { | 92 for( i = 0; i < len; i++ ) { |
| 93 sum = silk_SMLALBB( sum, inVec1[ i ], inVec2[ i ] ); | 93 sum = silk_SMLALBB( sum, inVec1[ i ], inVec2[ i ] ); |
| 94 } | 94 } |
| 95 return sum; | 95 return sum; |
| 96 } | 96 } |
| 97 | |
| 98 /* Function that returns the maximum absolut value of the input vector */ | |
| 99 opus_int16 silk_int16_array_maxabs( /* O Maximum absolute valu
e, max: 2^15-1 */ | |
| 100 const opus_int16 *vec, /* I Input vector [len]
*/ | |
| 101 const opus_int32 len /* I Length of input vecto
r */ | |
| 102 ) | |
| 103 { | |
| 104 opus_int32 max = 0, i, lvl = 0, ind; | |
| 105 if( len == 0 ) return 0; | |
| 106 | |
| 107 ind = len - 1; | |
| 108 max = silk_SMULBB( vec[ ind ], vec[ ind ] ); | |
| 109 for( i = len - 2; i >= 0; i-- ) { | |
| 110 lvl = silk_SMULBB( vec[ i ], vec[ i ] ); | |
| 111 if( lvl > max ) { | |
| 112 max = lvl; | |
| 113 ind = i; | |
| 114 } | |
| 115 } | |
| 116 | |
| 117 /* Do not return 32768, as it will not fit in an int16 so may lead to proble
ms later on */ | |
| 118 if( max >= 1073676289 ) { /* (2^15-1)^2 = 1073676289 */ | |
| 119 return( silk_int16_MAX ); | |
| 120 } else { | |
| 121 if( vec[ ind ] < 0 ) { | |
| 122 return( -vec[ ind ] ); | |
| 123 } else { | |
| 124 return( vec[ ind ] ); | |
| 125 } | |
| 126 } | |
| 127 } | |
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